Lakes / Louisiana / Concordia County
Lakes in Concordia County, Louisiana
21 lakes counted in Concordia County - the largest is Lake Saint John at 2,126.93 acres.
21
Lakes Counted
2,126.93 acres
Largest - Lake Saint John
50 ft
Deepest - Lake Concordia
Concordia County, highlighted, with its largest counted lakes dotted. Outlines from Census boundary data.
All Counted Lakes
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Lake Saint John | Concordia | 2,126.93 acres | - |
| 2 | Lake Concordia | Concordia | 1,026 acres | 50 ft |
| 3 | Black Lake | Concordia | 302.74 acres | - |
| 4 | Mud Lake | Concordia | 237.96 acres | - |
| 5 | Artonish Lake | Concordia | 141.89 acres | - |
| 6 | Grand Bay | Concordia | 134.14 acres | - |
| 7 | Round Lake | Concordia | 113.21 acres | - |
| 8 | Big Blue Hole | Concordia | 100.32 acres | - |
| 9 | Martin Bay | Concordia | 99.97 acres | - |
| 10 | Kellers Lake | Concordia | 89.98 acres | - |
| 11 | Morel Lake | Concordia | 88.44 acres | - |
| 12 | Williams Lake | Concordia | 87.57 acres | - |
| 13 | Welsh Lake | Concordia | 77.37 acres | - |
| 14 | French Lake | Concordia | 58.15 acres | - |
| 15 | Lorran Lake | Concordia | 56.71 acres | - |
| 16 | Brushy Bayou | Concordia | 52.83 acres | - |
| 17 | Ox Lake | Concordia | 51.8 acres | - |
| 18 | Shanty Lake | Concordia | 45.17 acres | - |
| 19 | Flat Lake | Concordia | 39.53 acres | - |
| 20 | Lac A'Sostien | Concordia | 35.99 acres | - |
| 21 | Blue Lake | Concordia | 32.66 acres | - |
Sources: Louisiana Department of Wildlife and Fisheries lake data; USGS. Verified October 30, 2026.